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Sergio [31]
3 years ago
9

Please help I'm on a test rn

Chemistry
2 answers:
natka813 [3]3 years ago
7 0
Fridge so ur food doesn’t go off
belka [17]3 years ago
7 0
A microwave so that the heat waves can correctly cook your food if the microwave goes off you can’t
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A cylindrical glass tube 12.7 cm in length is filled with mercury (density =13.6 g/mL). The mass of mercury needed to fill the t
Kay [80]

Answer:

The inner diameter of the tube is 0.4410 cm.

Explanation:

Height upto which mercury is filled = 12.7 cm

Mass of mercury = 105.5 g

Density of mercury = 13.6 g/mL =13.6 g/cm^3

Volume of mercury:

\frac{Mass}{Density}=\frac{105.5 g}{13.6 g/cm^3}=7.7573 cm^3

A mercury in cylindrical glass tube is at height of 12.7 cm.

The radius of the inner diameter of the glass tube = r

Volume of cylinder = \pi r^2h

7.7573 cm^3=3.14\times r^2\times 12.7 cm

r = 0.4410 cm.

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3 years ago
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Using the van der waals equation, the pressure in a 22.4 l vessel containing 1.50 mol of chlorine gas at 0.00 °c is ________ atm
Lana71 [14]

Answer is: the pressure in a vessel is 1.48 atm.

V(Cl₂) = 22.4 L; pressure of chlorine gas.

n(Cl₂) = 1.50 mol; amount of chlorine gas.

T = 0.00°C = 273.15 K; temperature.

a = 6.49 L²·atm/mol²; the constant a provides a correction for the intermolecular forces.

b = 0.0562 L/mol; value is the volume of one mole of the chlorine gas.

R = 0.08206 L·atm/mol·K, universal gas constant.

Van de Waals equation: (P + an² / V²)(V - nb) = nRT.

(P +  6.49 L²·atm/mol² · (1.5 mol)² / (22.4 L)²) · (22.4 L - 1.5 mol·0.0562 L/mol) = 1.5 mol · 0.08206 L·atm/mol·K · 273.15 K.

(P +  6.49 L²·atm/mol² · (1.5 mol)² / (22.4 L)²) = (1.5 mol · 0.08206 L·atm/mol·K · 273.15 K) ÷ (22.4 L - 1.5 mol · 0.0562 L/mol).

P + 0.029 atm = 33.62 L·atm ÷ 22.31 L.

P = 1.507 atm - 0.029 atm.

P = 1.48 atm; the pressure.

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3 years ago
Calculate the number of grams of solid aluminium chloride that will form when a mixture containing 0.150 g of aluminum powder an
Alinara [238K]

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the answer is B:) have a good day

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What is a sign that a chemical change has happened?
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